Cables Yjvr 4X35mm2 RV-K Ymvkf RV-K Fxv 0.6/1kv Supper Flexible Conductor Power and Control Cable

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2025-07-25 06:19:50

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Details of Cable Products such as Yjvr and RV-K

I. Core Information of the Products Themselves

(I) Detailed Explanation of Specification Parameters

Basic Specification Description

This series of cables includes models like Yjvr, RV-K, Ymvkf, and Fxv, covering both Power Cables and Control cables. The core specifications include 4X35mm², etc. The "4X" represents a four-core structure, where each of the four cores is independently insulated and then combined into a whole, which can be respectively used for three-phase power supply and neutral line transmission. "35mm²" is the cross-sectional area of a Single Core Conductor, suitable for medium-power scenarios. The long-term allowable current-carrying capacity is about 110A (at an ambient temperature of 25°C), and it can carry a load of about 58kW (calculated according to the three-phase power formula).

In addition to 4X35mm², each model also includes other adaptive specifications (such as RV-K with smaller cross-sectional area specifications for control signal transmission). All models have a rated voltage of 0.6/1kV, among which 0.6kV is the insulation voltage between the conductor and the ground, and 1kV is the insulation voltage between conductors. They conform to the low-voltage power distribution system standards and can be directly connected to the 380V/220V industrial and civil power supply systems. The outer diameter of the cable varies according to the model and specification. The outer diameter of the 4X35mm² model is about 20mm, and the bending radius is only 6 times the outer diameter of the cable (about 120mm), which is much smaller than that of conventional cables, reflecting the super Flexibility characteristic.

Safety and Performance Parameters

The DC resistance of the conductor is ≤0.524Ω/km (35mm²), ensuring that the loss during power transmission is at a low level. The insulation resistance is ≥100MΩ·km (at 20°C). There is no breakdown in the power frequency withstand voltage test at 3kV for 5 minutes, and the partial discharge amount is ≤10pC (under 1.73U0), ensuring electrical safety under the rated voltage. The conductor resistance deviation of control cables (such as RV-K) is ≤±5% to ensure the stability of signal transmission and avoid signal attenuation or distortion. The tensile strength of the sheath is ≥12MPa, and the elongation at break is ≥125%, which can withstand mechanical stretching during laying and use.

(II) Material and Structural Design

Core Material Composition

Conductor: All series adopt super Flexible Conductors, which are stranded by multiple strands of fine Copper Wires. The number of strands of different models is optimized according to needs - Yjvr (Power Cable) is stranded by 49 strands of φ0.9mm copper wires, and RV-K (control cable) uses more strands of ultra-fine copper wires (such as 127 strands of φ0.5mm). The purity of copper wires is ≥99.95%, and the conductivity is ≥58MS/m. The stranded structure of multiple fine copper wires greatly improves the flexibility of the conductor, enabling the cable to bend flexibly in narrow spaces.

Insulation Layer: The insulation layer of power cables (such as Yjvr) is made of cross-linked polyethylene (XLPE) with a thickness of ≥1.0mm. XLPE material has excellent temperature resistance, with a long-term working temperature of up to 90°C and a short-term overload temperature of up to 130°C. Moreover, it has stable insulation performance and low dielectric constant. The insulation layer of control cables (such as RV-K) is polyvinyl chloride (PVC) with a thickness of ≥0.8mm. PVC Insulation has good electrical insulation performance, which can effectively isolate signal interference and ensure stable transmission of control signals.

Sheath: The sheath of power cables such as Yjvr is made of wear-resistant PVC material with a thickness of ≥1.2mm. Antioxidants and weathering agents are added to improve the service life and anti-aging ability of the sheath. The sheath of control cables such as RV-K is made of flexible PVC, which is softer in texture with a thickness of ≥1.0mm. It can adapt to frequent bending and has certain oil resistance, making it suitable for use in industrial environments with oil stains. Some models (such as Ymvkf) use fluoroplastic sheaths, which have stronger chemical corrosion resistance and are suitable for special industrial scenarios.

Structural Advantages

The cable adopts an overall structural design of "conductor → insulation layer → filling layer (some models) → sheath". The outer layer of the conductor is tightly wrapped with the insulation layer, and the two are bonded by the extrusion process without bubbles or gaps, ensuring the insulation effect. The gaps of four-Core Cables are filled with polypropylene fibers to make the cable structure more round and avoid uneven stress on the core wires during laying. The outermost sheath is closely bonded with the internal structure to form an overall protection.

The super flexible conductor combined with the flexible sheath greatly improves the bending performance of the cable. The minimum bending radius can be as low as 6 times the outer diameter of the cable, which can adapt to complex laying scenarios such as frequent movement of equipment and pipe 穿 in narrow spaces. The multi-strand fine copper wire structure of the control cable can also reduce losses during signal transmission and ensure the accurate transmission of control commands.

(III) Characteristic Uses and Scene Adaptation

Core Application Fields of Each Model

Yjvr (power cable): Suitable for power supply of industrial equipment, such as power connection of medium-power equipment like CNC machine tools and injection molding machines. It can also be used as the connecting wire of mobile power supply equipment (such as electric hoists). Its temperature-resistant and wear-resistant characteristics can meet the usage requirements of industrial environments.

RV-K (control cable): Mainly used for control lines of precision instruments, such as signal transmission between PLC control cabinets and executive components, and sensor connecting lines of automated production lines. It ensures the precise operation of equipment by virtue of stable signal transmission.

Ymvkf: Suitable for scenarios with special environmental requirements, such as equipment power supply and control lines in chemical workshops. Its chemical corrosion-resistant sheath can resist corrosion from corrosive gases and liquids in the workshop.

Fxv: Can be used for weak current control lines in buildings, such as line connections of security systems and building automation systems in smart buildings. It can also be used as the Power Line of small mobile equipment (such as electric tools).

Advantages of Scene Adaptation

In industrial workshops, Yjvr cables can bend flexibly with the movement of equipment, avoiding cable wear or breakage caused by equipment operation. RV-K cables can easily pass through narrow channels inside equipment in the complex line layout of automated production lines, reducing the space occupied by lines. In the field of precision instruments, the low signal loss characteristic of RV-K can ensure the accurate transmission of control commands and avoid equipment misoperation.

In oily environments, cables with oil-resistant sheaths can maintain stable performance for a long time. In humid environments, the moisture-proof performance of insulation and sheaths can effectively prevent water vapor from entering and ensure the safe operation of cables.

(IV) Production Process and Quality Control

Key Production Processes

Conductor Stranding: A high-speed bunching machine is used to strand copper wires. The stranding pitch is set according to the model (Yjvr pitch ≤30mm, RV-K pitch ≤20mm) to ensure that the conductor structure is tight and the flexibility meets the standard. During the stranding process, the copper wires are annealed (at a temperature of 400-450°C) to further improve the flexibility of the conductor.

Insulation Extrusion: A special extruder is used for XLPE insulation of power cables, with the melting temperature controlled at 200-220°C and the extrusion speed at 15m/min. A Φ50 extruder is used for PVC insulation of control cables, with the melting temperature at 160-180°C. An online thickness gauge is used to monitor the insulation thickness in real-time to ensure that the deviation is ≤±0.1mm.

Cabling Process: Four-core cables are arranged symmetrically on the cabling machine. After being filled with polypropylene fibers, they are wrapped with non-woven fabric for fixation. The cabling pitch is ≤300mm to ensure the roundness of the cable.

Sheath Extrusion: Corresponding extrusion equipment is selected according to the sheath material. The extrusion temperature of PVC Sheath is 160-180°C, and the extrusion temperature of fluoroplastic sheath is higher (adjusted according to material characteristics). After extrusion, it is cooled and shaped in a cooling water tank, with the cooling water temperature at 20-30°C to avoid cracks in the sheath due to sudden cooling.

Quality Inspection Standards

Each batch of cables must undergo multiple tests: electrical performance tests such as conductor DC resistance, insulation thickness, sheath thickness, insulation resistance, power frequency withstand voltage, and partial discharge; mechanical performance tests such as sheath tensile strength and elongation at break; as well as bending resistance test (no cracks and no decrease in electrical performance after 1000 bends) and wear resistance test. Control cables also need to undergo signal transmission performance tests to ensure that signal attenuation meets the requirements. Only after all tests are qualified can the products leave the factory, and test reports are attached with the goods.

II. Description of General Product Information

(I) Packaging Specifications

Packaging Form

Different packaging methods are adopted according to the cable model and length: short-length cables (within 100m, for example) are packaged in hard paper tubes, with moisture-proof paper lined on the inner wall of the paper tubes and sealed with plastic covers at both ends; long-length cables are packaged with wooden cable reels. The diameter of the cable reel is determined according to the cable specification (the diameter of the 4X35mm² model cable reel is 1.0m), and each reel can hold 200m of cable.

There are clear marks on the outside of the package, including product model, specification, length, rated voltage, production date, batch number, and manufacturer information. Product qualification certificates are pasted on both the paper tubes and cable reels, indicating that the products have passed the inspection and their key performance parameters.

Protection Design

The outer side of the wooden cable reel is wrapped with two layers of waterproof plastic film to prevent moisture during transportation; the cables packaged in paper tubes are added with sealant at the sealing positions at both ends to enhance the moisture-proof effect. Iron sheet guard rings are added to the edge of the cable reel to avoid damage to the cable due to collision during transportation and loading/unloading. There are also lifting positions on the package to facilitate loading and unloading with lifting equipment.

(II) Transportation and Storage Requirements

Transportation Specifications

Road Transportation: Use a fence truck for transportation. Place the cable reel flat in the carriage and fix it firmly with steel wire ropes to avoid rolling during transportation. The stacking height of cables packaged in paper tubes shall not exceed 3 layers, and buffer pads shall be placed between layers to prevent extrusion damage.

Railway Transportation: Load according to the railway freight transportation regulations to ensure that the cable package is stable and meets the safety requirements of railway transportation.

Loading and Unloading Requirements: Use special lifting equipment when loading and unloading the cable reel, and lift from the designated lifting position. It is forbidden to drag or roll the cable reel from the side. Cables packaged in paper tubes shall be handled with care to avoid falling.

Special Weather: Cover with a rain cloth during rainy days to prevent the cable from getting damp; avoid direct sunlight during high-temperature weather transportation, and a sunshade net can be covered.

Storage Conditions

The cable shall be stored in a dry, ventilated, and clean indoor warehouse to avoid direct sunlight, rain and snow soaking, and humid environments. The temperature in the warehouse shall be maintained between -15°C and 40°C, and the relative humidity shall not exceed 85%. The cable reel shall be placed on a flat ground and raised with skids to keep it away from the ground and prevent moisture; cables packaged in paper tubes shall be stacked neatly and kept away from heat sources and corrosive substances.

The storage period is 2 years. During the storage period, the cable package and appearance shall be inspected once every 3 months. If package damage or abnormalities in the cable sheath are found, timely treatment shall be carried out. Cables that exceed the storage period need to undergo performance testing again before use and can be used only if they are qualified.

(III) Delivery and Sample Services

Delivery Process

Order Confirmation: After receiving the customer's order, check the product model, specification, quantity, delivery address and other information within 1 working day, and confirm the inventory status. Conventional models (such as Yjvr 4X35mm²) are in stock and can be arranged for delivery within 24 hours; special models or customized specifications need to inform the customer of the delivery time according to the production cycle.

Stock Preparation and Inspection: During stock preparation, inspect the appearance and marks of the cable to ensure they are consistent with the order requirements. Before delivery, randomly select samples for key performance tests such as insulation resistance to reconfirm the product quality.

Delivery Arrangement: Select a suitable logistics company according to the order quantity and the customer's location. Small batches of goods are sent by express, and large batches of goods are transported by logistics special lines. After delivery, timely inform the customer of the logistics tracking number and logistics company information to facilitate the customer to track the transportation status of the goods.

Sample Policy

Customers can apply for free samples, with a sample length of generally 1 meter, including the complete structure of the applied model. Sample applications need to be submitted through official channels (such as customer service calls, official website messages), providing company name, contact information, and purpose. Samples are sent by express, and the freight is borne by the customer (if a purchase cooperation is reached later, it can be negotiated to deduct from the payment). The samples are attached with material descriptions and abridged test reports to facilitate customers to understand product characteristics.

(IV) After-Sales Service Guarantee

Quality Commitment

The product warranty period is 2 years (from the date of delivery). Within the warranty period, if the product cannot be used normally due to its own quality problems (such as insulation layer breakdown, sheath cracking and other non-human damages), the company will replace the product of the same specification for the customer free of charge and bear the round-trip freight. For product damage caused by improper use by customers (such as use beyond the rated voltage, mechanical damage, etc.), the company can provide repair or replacement services, and the relevant costs shall be borne by the customer.

Problem Handling

Response Time: After the customer reports a product problem, the customer service staff will respond within 2 hours to understand the details of the problem.

Solutions: For minor problems (such as slight damage to the sheath), provide repair plans and required materials (such as special tapes, sealants); for serious quality problems, put forward specific solutions (such as product replacement) within 48 hours and implement them as soon as possible.

On-site Support: If the customer needs technical personnel to assist in solving problems on-site, they will arrive in adjacent areas within 24 hours and in remote areas within 48 hours (except for special circumstances).

Additional Services

Technical Support: Provide customers with product selection guidance, and recommend suitable models and specifications according to the customer's use scenarios and power requirements. Provide the "Cable Laying Guide", which includes laying environment requirements, bending radius, fixing methods, etc., to help customers lay cables correctly.

Installation Guidance: Provide technical consultation on cable wiring and terminal processing, and can send relevant operation videos and graphic materials. For bulk purchase customers, technical personnel can be arranged for on-site installation guidance.

Regular Return Visits: Make a telephone return visit to the customer 1 month after delivery to understand the product use situation; make a return visit once every six months within the warranty period to remind the customer to carry out necessary maintenance and inspection.

III. Summary of Product Advantages

Cables of models such as Yjvr and RV-K have super flexible conductors as their core advantage, adapting to complex laying scenarios. Specifications such as 4X35mm² can meet the needs of medium-power power transmission and control signal transmission. In terms of materials, the combination of Copper Core with XLPE, PVC and other insulation sheaths balances conductivity, flexibility and environmental resistance. Strict quality control and perfect testing procedures in the production process ensure the reliability of the products.

In terms of general information, standardized packaging, reasonable transportation and storage requirements reduce the risk of damage to products during circulation. Efficient delivery processes, thoughtful sample services and comprehensive after-sales services provide customers with a convenient purchasing experience and use guarantee.

Whether it is industrial equipment power supply, precision instrument control, or mobile equipment connection, these cables can meet the needs of different scenarios with their super flexibility, stable performance and perfect services. Users can choose suitable models according to their own use scenarios and needs and enjoy full-cycle support from selection to use.